11. The reaction of gaseous sodium azide (NaN3) to form sodium metal and molecul

Question

11. The reaction of gaseous sodium azide (NaN3) to form sodium metal and molecular nitrogen is the reaction used in some automobile airbags. When a car decelerates very quickly, as in a head-on collision, an electrical circuit is activated and initiates the process of inflating the airbag. Once the electrical circuit has been initiated, a pellet of sodium azide is ignited and a rapid reaction occurs, generating nitrogen gas. This gas then fills the air bag and provides "cushion" to the head and torso for maximum protection. a. Complete and balance the chemical equation (with physical states). b. Classify the reaction (based on the six types in the introduction):

Explanation / Answer

a) The reation is

2Na(s) + 3 N2(g)=2 NaN3(g)

b)TPhis is a combustion reaction.

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